MK Products Prince XL MM Com ACWC - Manual (Page 16)

Prince ® XL Millermatic Compatible Gun Owner's Manual - Page 9
Troubleshooting Guide
Trouble Cause Remedy
No wire feed at gun,
feeder not operating,
i.e. no slave motor or
brake solenoid
115/42 VAC control fuse
in feeder.
Replace fuse.
Micro-switch defective/not
being activated.
Replace switch. Check switch for
operation.
Broken electrical cable.
Check micro-switch wires for
continuity.
No wire feed at gun,
feeder operating
properly.
4 amp fuse in feeder/
Control box blown.
Check motor leads for shorts, then
replace fuse.
Bad potentiometer. Check potentiometer with meter.
Broken electrical cable.
Check motor and potentiometer wires
for continuity.
Bad speed control/PCB.
See specific cabinet/control box
owners manual for speed control
operation.
Wire feeds, but
welding wire is not
energized.
Loose or no cable
connections.
Check all power connections.
Contactor control cable
loose or in wrong position.
Check power supply owners manual
for location and type of contactor
signal required, i.e., closing or 115
VAC.
Welding power source. Check power source manual.
Wire feeds erratically.
Dirty or worn conduit. Blow out or replace conduit.
Incorrect pressure on
drive rolls.
Adjust pressure at both feeder and
gun.
Idler roll stuck.
Check for lock washer under idler roll,
or replace if damaged.
Wrong size contact tip. See contact tip table.
Wire feeds one speed
only.
Bad potentiometer. Check with meter.
Broken electrical cable.
Check potentiometer wires for
continuity or short.
Bad speed control
See specific cabinet/control owners
manual for speed control operation.
Wire walks out of
drive rolls.
Idler roll upside-down. Place groove in idler roll toward top.
Rear wire guide missing. Replace wire guide.
Poor gas/water flow.
Incorrect placement of
barrel insulator.
To replace a barrel assembly, push
the barrel assembly into the gun body
until it clicks to a stop. To assure
proper seating of the barrel, open
the drive/idler roll door in the top of
the handle. the rear face of the barrel
should now be flush with the gun
body.